<template>
  <form action="" class="validate-form-container">
    <slot name="default"></slot>
    <div class="submit-area" @click.prevent="submitForm">
      <slot name="submit">
        <button type="submit" class="btn btn-primary">提交</button>
      </slot>
    </div>
  </form>
</template>

<script lang="ts">
import { defineComponent, onUnmounted } from "vue";
import mitt from 'mitt';

type ValidateFunc = () => boolean;
// type Events = {
//   'form-item-created': string
// }
export const emitter = mitt()

export default defineComponent({
  emits: ["form-submit"],
  setup(props, context) {
    let funcArr: ValidateFunc[] = [];
    const submitForm = () => {
      const result = funcArr.map(func => func()).every((result) => result);
      context.emit('form-submit', result)
    }
    const callback = (func?: ValidateFunc) => {
      if (func) {
        funcArr.push(func);
      }
    }
    emitter.on('form-item-created', callback);
    onUnmounted(() => {
      emitter.off('form-item-created', callback)
      funcArr = []
    })
    return {
      submitForm
    }
  }
})
</script>




<style scoped></style>
